The experimental program consists of testing one-third scale
square (150 150 mm) column specimens with a height of
1000 mm in three phases as follows; Phase 1: Control column specimens
without any preloading and without ferrocement jackets,
Phase 2: Jacketed column specimens without any preloading but
with ferrocement jackets, and Phase 3: Strengthened preloaded
column specimens include columns strengthened with ferrocement
jackets after preloading them with 60%, 80% and 100% of
their ultimate axial strength.
The number and details of the square reinforced concrete column
specimens are given in Table 1. The details of reinforcements